Certified for duty by the U.S. Marine Corps, these boots are specially designed to keep feet cool and energized on even the longest march. Made with breathable Wolverine Warrior Leather and nylon uppers and a moisture-wicking lining. A removable insole features heel and forepart shock-absorbing pads, while the long-wearing Vibram Bob DuraShocks outsole resists everything from slips to heat conduction to abrasion. ASTM F2413-05 Rated.